At your age you will not gain any further height. You have reached the maximum height. Please do not believe any advertisements and take medications/supplements/hormones to help you increase your height. Concentrate on maintaining a healthy lifestyle, regular exercise, positive attitude and stay healthy. In due course of time you will be fine. On a positive note, due to your height people will always think you are much younger than your age, as long as you maintain your weight well. So don't worry.